Analysis and Performance of a New Iteratively Controlled Digital Prediction Filter. - Atsushi Fukasawa; Kenichiro Hosoda; Ryoichi Aizawa; Hiroshi Miyakawa (ICC (3), 1984)

An advanced 32 kbit/s ADPCM coding to transmit speech and high-speed voiceband data. - Atsushi Fukasawa; Kenichiro Hosoda; Takashi Kanda; Yohtaro Yatsuzuka; Makoto Takahashi (ICASSP, 1986)

A 32 kbit/s ADPCM algorithm having high performance for both voice and 9.6 kbit/s modem signals. - Kenichiro Hosoda; Osamu Noguchi; Yohtaro Yatsuzuka (IEEE J. Sel. Areas Commun., 1988)